Punch operating mechanism



W 19. D A BENNH PUNCH OPERATING MECHANISM Filed May 24, 1940 l- Sheets-Sheec l @XM/MQ A. EMMEN PUNCH OPERATING MECHANISM Filed may 24, 1940 L Smets-Sheet 3 Patented Nov. 19, 1940 UNITED STATES PATENT OFFICE 17 Claimsf This invention relates to punch operating mechanism; and has special reference to mech- Vanisrn for reducing the power required to operate the punches.

More specifically, the invention comprises operating mechanism for use in connection with punches of the type disclosed in my copending applications Serial No. 302,815, patented May 28, 1940, No. 2,202,513, and Serial No. 302,816, patented May 28, 1940, No. 2,202,514, both of which applications were led November 4, 1939.

Objects of the invention are to provide lever connections mounted on the frame of the portable punch and engaging the shaft of the punch for rotating the same in forward and reverse directions; to provide an arm attached to the punch shaft and supporting a detent device that may be reversed in order to reverse rotation of said shaft; to provide socket members and means for pivotally supporting them upon the frame of the punch, with releasable connections therefrom to said arm whereby said arm may be operated and the shaft rotated without the application of an excessive amount of force or power; to provide a socket in direct connection with said arm adapted to be engaged by a lever to rotate the punch shaft in either direction without the use of said socket members and the connections therefrom to said arm; and to provide means for adapting the specic frames of the punches disclosed in said applications to support the operating mechanism of the present invention.

Another object of the invention is to provide a link connection between the pivctally mounted socket members and the arm that is attached to the punch shaft to facilitate rotation of said shaft by use of a lever in connection with said socket members.

Another object of the invention is to provide an improved operating mechanism for a portable punch comprising gearing mounted on the punch frame and operatively connected with the punch shaft, in combination with a socket and ratchet device by oscillation of which said gearing may be rotated intermittently in either direction to operate the punch or to release the punch from engagement with the article that had been punched.

Another object of the invention is to provide an improved mounting for the punch shaft which may be removed and replaced and the punch reconditioned for further use after said mounting becomes worn and damaged.

Other objects will appear from the following description, reference being made to the annexed drawings, in which- Fig. 1 is a side elevation of my improved portable punch without the operating mechanism of the present invention.

Fig. 2 is a side elevation with a part in section showing my improved punch with the operating mechanism mounted thereon.

Fig. 3 is an end elevation of the punch and operating mechanism shown in Fig. 2. 10

Fig. 4 is a sectional View on the line 4--4 of Fig. 2.

Fig. 5 is an end elevation of the punch showing the operating mechanism in a different position from that shown in Fig. 3.

Fig. 6 is a sectional view of the operating mechanism on the line 6--6 of Fig. 2.

Fig. 7 is an end elevation of the punch showing the connecting link or yoke disengaged from the arm that is attached to the punch shaft.

Fig. 8 is a sectional View on the line 8-8 of Fig. 3.

Fig. 9 is a sectional view on the line 9 9 of Fig. 3. i

Fig. 10 is a perspective view of the latch device apart from its support.

Fig. 1l is a sectional view showing the cooperative relationship of the die, the punch shaft and the punch.

Fig. 12 is a sectional view on the line I2--I2 of Fig. 6.

Fig. 13 is an enlarged sectional view on the line I3--l3 of Fig, 11.

Fig. 14 is a side elevation of the yoke of conn necting link apart from the elements with which it is connected.

Fig. 15 is a side elevation of a removable and replaceable threaded bushing adapted for use to support the punch shaft.

Fig. 16 is a side elevation of a portable punch of the type disclosed in my said applications connected with an adapter for supporting the operating mechanism of the present invention.

Fig. 17 is a sectional View on the line ll-I'l of Fig. 16.

Fig. 18 is an end elevation of the punch shown in Fig. 16, the punch shaft being in section.

Fig. 19 is a cross-sectional view on the line Ill-I9 of Fig. 16.

Fig. 20 is an inner side elevation of one of the adapter members for supporting the operating mechanism.

Fig. 21 is a side elevation of a portable punch equipped with gearing for operating the punch shaft. 55

Fig. 22 is a plan view of the punch shown in Fig. 21, parts being in section.

Fig. 23 is a sectional view on the line 23-23 of Fig. 22.

Fig. 24 is a side elevation of a portable punch having the gearing mounted at the end of the frame instead of at the side as in Fig. 21.

Fig. 25 is an end elevation of the punch and the operating mechanism therefor shown in Fig.

As disclosed in said patented applications and as shown in the annexed drawings, the unitary metallic frame of the punch is generally of C- shape. It comprises a plate portion I, opposite integral outer marginal reinforcing flanges 2, ax-

ially alined enlarged terminal portions 3 and 4,

inner opposite integral marginal flanges 5, and a number of opposite reinforcing flanges 6. This frame is portable, possesses a maximum degree of strength, and may be provided with a handle A removable, replaceable and interchangeable die 8 opens through the frame part 3 for the discharge of waste punched portions. A thread- 25 ed punch shaft 9 is supported by the part I in axial alinement with the die for rotary and longitudinal movements toward and from the die. As disclosed in said application Serial No. 362,- 816, (Patent No. 2,202,514), and in Figs. 1 and 16, the outer end of the shaft 9 is formed 'with a polygonal portion I) for engagement with a device for operating said shaft S. The body II (Figs. 1l and 13) of a punch I2 extends into an axial bore in the inner end of the shaft 9 in 35 abutting engagement with a thrust bearing disc I3, and is formed with a circumferential groove I4. After the punch body is placed in said position, one or more pins I5 are forced into holes in the shaft 9 within the groove I4 to prevent 40 detachment of the punch and leave the shaft 9 free to rotate about its axis and about the punch during punching and withdrawal operations of the punch. In rotating the shaft S to withdraw the punch from the hole punched thereby, the

45 punch is usually held by friction from rotating with the shaft 3. This applies frictional forces against the pins |5, tending to move them longitudinally from the holes in which they are mounted unless provision is made to prevent such 50 longitudinal movement of said pins. As shown in Fig. 13, the inner ends of the pins I5 abut against shoulders I5 arranged to prevent longitudinal movement of said pins during reverse rotation of the shaft 9 to withdraw the punch from the 55 work. The outer ends of the holes in which the pins I5 are mounted may be tapped and provided with removable and replaceable screws Il cooperating with the shoulders I6 to hold the pins I5 positively in position. The pins I5 may 60 be removed by detaching the screw plugs I'I and forcing a punch into the reduced holes I3 beyond the-shoulders I6. These devices for preventing displacement of the pins I5 constitute a part of the present invention,

65 The present invention also includes means for avoiding the necessity of having to scrap the entire punch frame when the threads therein supporting the shaft 9 become stripped or deformed. For this purpose, I have provided sleeve I9 having V-threads 24 on its outer periphery screwed into a similarly threaded hole in the frame part 4 and formed with a circumferential flange 2| on its outer end seating against the end of the part 4 and attached thereto by re- 75. movable and replaceable screws 22. The inside of the sleeve I3 is threaded to receive the shaft 9. The V-threads on the outer periphery of the sleeve provide a maximum amount of metal to prevent shearing of the threads when the shaft 9 is rotated in punching operations.

A sleeve Z3 is detachably mounted on the polygonal portion I5 of the shaft S and has a circumferential series of teeth 24 (Fig. 6). An annular frame 25 is mounted to enclose and rotate about the sleeve 23, and is formed with an integral radial socket or tubular extension 26 which encloses a reversible ratchet head or pawl 2'I pressed into engagement with the sleeve 23 by a spring 28. A latch device 29 attached to the outer end of the stem of the ratchet head 21 `provides means for holding said ratchet head in the different adjusted positions to which it may be turned. The frame 25 may also be formed with an integral socket 30 adapted to be engaged by a lever 3| to turn said frame alternately in opposite directions and thereby rotate the shaft 9 in accordance with the invention of said application Serial No. 302,816.

One embodiment of the present invention (Figs. l to 7) comprises a rearwardly extended arm 32 having a trunnion 33 projecting laterally from the rear end thereof parallel with the axis of the shaft 9. An operating element comprising a pair of diverging sockets 34 and 35 is pivoted on the trunnion 33 between a ange 36 thereon and a retaining washer 3l attached to the outer end thereof by a screw 38. A yoke link composed of two arms 39 and 46 integrally connected at their forward ends by a web 4I is mounted on a pivot 4E extending through the operating element comprising the sockets 34 and 35. The inner end 43 of the pivot 42 is adapted to engage a projection 44 extending from the arm 32 and support the operating element turned to the left from the position in which it is shown in Fig. 7 to prevent it from dropping or oscillating and striking the hand of the workman engaging the sockets 26 and 30. The arms of the yoke link are formed with notches 46 to receive the lugs 45. The lugs 45 may comprise projecting ends of a pin mounted in rigid connection with an arm 41 formed integral with the socket 26, or may comprise integral parts of said arm. The arm 41 is received between the arms 39 and 40 when the lugs 45 are engaged in the notches 45. If desired, a keeper 48 may be pivotally connected with one of the arms of the yoke by a pivot 49 (Figs. 8 and 9) and moved to position below the adjacent lug 45 (Figs. 3 and 5) to prevent disengagement of the yoke from said lugs.

In this form of the device, a lever 5I (Fig. 6) is engaged in one of the sockets 34 or 35 and the operating element is thereby oscillated about its supporting trunnion 33. When the operating element is oscillated properly by the lever 5I, the pawl 27 will turn the shaft 9 and operate the same longitudinally to punch a hole through the piece 52, which may be the web of a rail or other article extended between the die 8 and the punch I2. The levers 3| and 5I are interchangeable within the sockets 3|), 34 and 35. The two sockets 34 and 35 are provided with the same operating element for convenience in engaging and disengaging the lever 5I or the lever 3|, the socket 34 permitting farther movement of the operating element by either of said levers than does the socket 35, as should be apparent by reference to Fig. 6.

In Figs. 16 to 20, inclusive, I have illustrated the invention embodied in an adapter device conlill 4asiaaoe/i structed to `be attached tothe frames of the portable punches disclosed in said applications Serial No. 302,815, (Patent No. 2,202,513), and Serial No. 302,816, (Patent No. 2,202,514). As shown,"the adapter comprises a pair of plates 53 and 5t adapted to be placed on opposite sides of the punch frame and rigidly secured thereto by bolts 55 which may be removed to permit removal of the adapter. The plates 53 and 54 fit within the spaces defined by the flanges 3 and 5 and extend across the fiange 2 at the end of the frame in which the shaft 9 is mounted. Beyond the end of the punch frame the plate 53 is formed with a vertical dovetailed tenon 56, and the plate 55 is formed with a vertical dovetailed groove 5l' to receive and interlock with said tenon. Thus, the plates 53 andv 54 are rigidly interlocked beyond the end of the punch frame and are likewise rigidly attached to the punch frame by the bolts 55. The plate 54 is formed with an integral rearwardly extended arm 58 analogous to the arm 32 and having a trunnion 59 projecting laterally therefrom parallel with the axis of the shaft 9 similar to the trunnion 33. The trunnion 59 has a circumferential flange 50 and the arm 58 has a projection iii functioning for the Same purposes as the flange 35 and projection 44, already described. The trunnion 59 is adapted to receive and .support the operating element that is mounted on the trunnion 33 for connection with the mechanism that is mounted on the end l of the shaft 9 in the manner' already described and for like operation.

The operating mechanism for the punch shaft il as shown in Figs. 21 and 22 comprises a worm gear 52 attached to the shaft 9 for rotating the same and engaged by a worm 63 rigid on a stud shaft tfl. The stud shaft 5t is rotatively supported by a bracket 55 integral or rigid with the punch frame. As shown, the shaft 64 is at right angles to the axis of the shaft 9. A gear 66 attached to the shaft 55 is engaged by a pinion 6'! formed rigid with a gear 68 and supported for rotation on a trunnion 69 rigid or integral with the punch frame and parallel with the shaft 6ft. The gear 68 is permanently engaged by a pinion 'lil attached to a sleeve ll supported for rotation on a trunnion 12 rigid or integral with the punch frame and parallel with the axes of the shaft 54 and trunnion 69. The outer end of the sleeve 'Il comprises a circumferential series of ratchet teeth 13 enclosed by a frame M having a radial socket or sleeve l5 and socket 76. The ratchet device 'H with its actuating spring 18 and latch device 'i9 mounted in the sleeve l5 are duplicates of the ratchet device 2l, spring 28 and latch device 29 in their' construction, adaptability and mode of operation. The socket 16 is arranged to receive one end of a lever such as the lever 3l or the lever 5l for oscillating the actuator to operate the train of gearing therefrom to the shaft 9 to rotate the latter in either direction. In this arrangement, the gearing is mounted principally at one side of the punch frame.

In the arrangement of the invention shown in Figs. 24 and 25, the operating unit of which the socket 'i6 is a part is mounted on a trunnion 80 for oscillating movements, and is connected with a similar ratchet device 'il for turning a ratchet pinion like the pinion 13. Said ratchet pinion is rigidly connected with a gear 3i rotative on the trunnion 8f3 and meshing with a gear 82 rotative 0n a trunnion 83 formed integral or rigid with the punch frame. A pinion 84 is attached f to the gear 32 and meshes with a gear 85 secured to the outer end of the Shaft 9 for rotating the same. In this arrangement, the gearing is sup-v ported at the end of the punch frame on trunnions having their axes parallel with the axis of the shaft 9.

It is obvious thatl the parts may be arranged in other relative positions, as desired.

From the foregoing, it should be apparent that this invention attains all of its intended objects and purposes` eiiiciently and satisfactorily. It provides means whereby the punch shaft may be more easily operated to punch holes through materials or articles of considerable thickness than could be done by attachment of a lever directly to the shaft 9. lIlhe mechanism of the invention may be arranged in different ways and may be mounted on supports permanently united with the punch frame, or upon adapters designed for optional attachment to the punch frame. I contemplate such other variations in the construction and arrangement of the parts comprising the invention as may be needed to adapt the invention for its various uses.

I claim:

1. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a trunnion, a support for said trunnion rigid With said frame for supporting said trunnion at a distance from and parallel with said shaft, an actuator pivotally supported by said trunnion, mechanism rigidly engaged with said shaft for rotating said shaft intermittently in either direction when said actuator is oscillated about said trunnion, and a yoke link having one end pivotally connected with said actuator and its opposite end pivotally connected with said mechanism for operating said mechanism and thereby rotating said shaft as aforesaid.

2. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; ratchet mechanism mounted on the outer end of said shaft for rotating the same intermittently in one direction by oscillating movements of said ratchet mechanism, means for holding said ratchet mechanism in positions to rotate said shaft in either direction as desired, a trunnion rigid with said frame, a socket pivotally supported by said trunnion for engagement with an operating lever, and a yoke having one end pivotally attached to said socket and the opposite end pivotally attached to said ratchet mechanism for imparting oscillating movements to said ratchet mechanism to rotate said shaft intermittently in either direction as aforesaid.

3. In a'portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; ratchet mechanism mounted on the outer end of said shaft for oscillating movements, a trunnion rigid with said frame at a distance from and parallel with said shaft, a socket pivotally supported by said trunnion for engagement with an actuating element, a yoke pivotally connected with said socket, means for holding said yoke in engagement with said ratchet mechanism for operating the same, and means for limiting turning movement of said yoke about said trunnion.

4. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; ratchet mechanism mounted on the outer end of said shaft for rotating the same, a trunnion rigid with said frame, an actuator pivotally mounted on said trunnion, means for limiting turning movements of said actuator about said trunnion, a yoke pivotally connecting said actuator with said ratchet mechanism, means for preventing detachment of said yoke from said ratchet mechanism, and means for limiting relative turning movements of said yoke and said actuator.

5. In a portable punch comprising a metallic frame of appproximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; an arm integral with one end of said frame, a trunnion rigidly supported by said arm parallel with said shaft, an actuating socket pivotally mounted on said trunnion, means for limiting turning movements of said socket about said trunnion, and mechanism operated by said socket for turning said shaft intermittently in one direction by oscillating movements of said socket.

6. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; reversible ratchet mechanism on the outer end of said shaft for optionally turning said shaft in either direction when said ratchet mechanism is oscillated, a trunnion rigidly supported by said frame parallel with said shaft, an actuator pivoted on said trunnion, means for connecting said actuator with said ratchet mechanism for oscillating the latter by oscillating movements of said actuator, and means for limiting extent of movement of said ratchet mechanism by said actuator at each operation thereof.

'7. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a plate, means for holding said plate in rigid connection with said frame, a trunnion projecting from said plate parallel with said shaft, and mechanism supported by said trunnion and said shaft for rotating said shaft.

8. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a trunnion, detachable means for holding said trunnion in rigid connection with said frame, ratchet mechanism on said shaft, an actuator pivoted on said trunnion, and connections for rotating said shaft intermittently in one direction by oscillating movements of said actuator about said trunnion.

9. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a pair of plates having said frame interposed between them, means rigidly holding said plates on said frame, a trunnion integral with one of said plates and extending therefrom parallel with said shaft,

and mechanism supported by said trunnion and said shaft for rotating said shaft.

10. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a pair of plates, elements rigidly and detachably holding said plates on said frame, a trunnion projecting from one of said plates parallel with said shaft, mechanism on said shaft for rotating the latter, an actuator pivotally supported on said trunnion, means for limiting extent of turning movements of said actuator about said trunnion, and a yoke connecting said actuator with said mechanism for rotating said shaft intermittently in one direction by oscillating movements of said actuator.

ll. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a toothed wheel rigid with the outer end of said shaft, a trunnion rigid with said frame, a sleeve pivoted on said trunnion, gearing connecting said sleeve with said toothed wheel for rotating the latter and thereby said shaft, a socket detachably pivoted on said sleeve for oscillating movements and adapted to receive an operating lever, and mechanism for rotating said sleeve intermittently in one direction only by successive oscillating movements of said socket.

l2. A portable punch comprising a metallic frame cf approximately C-shape having a tubular die rigid with and opening through one end thereof, a punch operating shaft screwed through the opposite end of said frame in axial alinement with and for movements toward and from said die and having an axial bore in its inner end and also having a hole therethrough opening into said bore, a punch extending into said bore and having a circumferential groove at said hole, a pin mount-ed in said hole and extending through one portion of said groove preventing outward displacement of said punch and leaving said punch free to rotate within said bore, and a shoulder within said hole for preventing longitudinal displacement of said pin by said punch when said shaft is rotated to withdraw said punch from a hole made thereby and said punch is held from rotating with said shaft.

13. A portable punch comprising a metallic frame of approximately C-shape having a tubular die rigid with and opening through one end thereof, a punch operating shaft mounted in the opposite end of said frame in axial alineinent with said die and having a bore in its inner end and also having a hole therethrough opening into said bore, means for rotating said shaft and moving the same axially toward and from said die, a punch extending into said bore for rotation relative to said die and having a circumferential groove at said hole, a pin frictionally mounted in said hole and extending through one portion of said groove preventing outward withdrawal of said punch from said bore and leaving said punch free to rotate relative to said shaft, a shoulder within said holey abutting against one end of said pin, and preventing longitudinal displacement of said pin in one direction when said shaft is rotated and said punch is held from rotation, and means for preventing longitudinal displacement of said pin in the opposite direction.

14. In a portable punch comprising a metallic evi frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; a trunnion rigidly attached to said shaft, an actuator pivoted on said trunnion, mechanism engaged with said shaft for imparting intermittent rotary movements thereto by oscillating movements of said mechanism, a means detachably pivoting said yoke to said actuator, means attached to said mechanism for engaging said yoke, and a device supported by said yoke preventing detachment thereof from said means.

15. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die mechanism engaged with said shaft for rotating said shaft intermittently in either direction when said mechanism is oscillated alternately in opposite directions, a socket in connection with said mechanism for oscillating the same, power increasing mechanism for oscillating said first named mechanism to rotate said shaft, and detachable means for connecting said power increasing mechanism with said oscillating mechanism to operate said oscillating mechanism independently of said socket.

16. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for movement toward and from said die; mechanism engaged with said shaft for rotating said shaft intermittently in either direction when said mechanism is oscillated alternately in opposite direc tions, a socket in connection with said mechanism for oscillating the same, power increasing mechanism for oscillating said rst named mechanism to rotate said shaft, detachable means for connecting said power increasing mechanism with said oscillating mechanism to operate said oscillating mechanism independently of said socket, and means for limiting extent of movement of said power increasing mechanism.

17. In a portable punch comprising a metallic frame of approximately C-shape having a die at one end, and a punch operating shaft screwed through the opposite end of said frame for move-- ment toward and from said die; a trunnion rigid, with said frame, an actuator pivotally supported by said trunnion, a socket disalined from and connected with said actuator for operation thereby, a ratchet mounted in said socket, mechanism engaged with said shaft for rotating the same, a spring enclosed in said socket for holding said ratchet in yielding engagement with a part of said mechanism to operate said mechanism and thereby rotate said shaft when said actuator is oscillated about said trunnion, and manual means outside of said socket and connected with said ratchet for turning said ratchet to either cf two adjusted positions to operate said mechanism intermittently in one direction by successive oscillating movements of said actuator and for preventing accidental displacement of said ratchet.

DALE A. BENNER. 

